Plant Care

Most people meet exactly one aloe in their life: Aloe vera, sitting on a windowsill next to the sink, harvested whenever someone touches a hot pan. That is a shame, because the genus Aloe contains more than 600 accepted species — tree-sized giants, spiral-leaved architectural oddities, white-speckled miniatures small enough for a teacup, and coral-flowered garden plants that hummingbirds fight over. It is also genuinely confusing. Aloes get mislabeled constantly at garden centers, they change appearance dramatically between juvenile and mature stages, and several unrelated plants — agaves, haworthias, gasterias — get sold as aloes. This guide is built to solve that. Below you will find a fast identification key, then 20 aloe species and cultivars described by the features you can actually see: leaf shape, markings, teeth, color, growth habit, and mature size. How to Identify an Aloe: The Fast Key Before you compare species, confirm you are holding an aloe at all. Aloes share four traits: Thick, fleshy, water-filled leaves arranged in a rosette, with clear gel inside when cut. Soft teeth or spines along the leaf margins — usually flexible, not woody. Tubular flowers on a tall unbranched or lightly branched stalk, typically orange, red, coral, or yellow. Shallow, fibrous root systems and a tendency to produce offsets ("pups") at the base. Common look-alikes and how to tell them apart: Plant Looks like aloe because How to tell it apart Agave Fleshy rosette with marginal spines Leaves are fibrous and stringy, not gel-filled. Terminal spine is hard and sharp. Flowers once, then dies. Haworthia Small rosette, white markings Much smaller, leaves stiffer and often translucent-tipped. Flowers small and white, not tubular orange. Gasteria Thick spotted leaves Leaves usually arranged in flat opposite pairs, tongue-shaped, no marginal teeth. Yucca Spiky rosette form Leaves thin, stiff, and dry — not succulent at all. Once you have confirmed it is an aloe, work through four questions: How big is it at maturity? (miniature under 6 inches, medium 1–2 feet, tree over 3 feet) Are the leaves spotted, striped, banded, or plain? Are the teeth soft and pale, or hard and dark? Does it grow as a single rosette, a clumping colony, or on a woody trunk? Those four answers narrow 600 species to a handful. The Everyday Aloes 1. Aloe vera (Aloe barbadensis miller) The medicinal aloe and the one you already know. Thick grey-green upward-pointing leaves, 12–24 inches long, with pale soft teeth along the margins. Young plants often show faint white speckles that fade with age — a frequent source of misidentification. Produces offsets prolifically. Yellow flowers on a tall spike, though it rarely blooms indoors. Grows in a stemless rosette that eventually sprawls under its own weight. Our aloe vera care guide covers it in detail, and our aloe vera varieties guide compares its cultivars. 2. Aloe maculata (soap aloe, formerly Aloe saponaria) The aloe most often mistaken for a spotted Aloe vera. Broad triangular leaves in a flat rosette, heavily marked with elongated white blotches arranged in loose bands, edged with distinctly dark reddish-brown teeth. Grows 12–18 inches wide and clumps aggressively. Flowers are a spectacular flat-topped coral head on a branched stalk. Sap is soapy, hence the name. 3. Aloe arborescens (torch aloe, krantz aloe) The shrub aloe. Multi-branched, growing into a woody-stemmed mound six to ten feet tall and just as wide outdoors. Leaves are narrow, strongly recurved, blue-green, with prominent pale teeth. Blooms in winter with brilliant vermilion torch-like spikes — one of the best hummingbird plants in mild climates. Distinguished from Aloe vera by its branching habit and much narrower, more curved leaves. 4. Aloe ferox (cape aloe, bitter aloe) A single-trunked tree aloe reaching 6–10 feet with a dense crown of thick blue-green leaves up to three feet long. Reddish-brown spines appear not just on the margins but scattered across leaf surfaces on young plants. Dead leaves persist as a skirt on the trunk. Source of commercial bitter aloe. Slow, dramatic, and best as a container specimen or landscape plant in warm zones. Miniature and Windowsill Aloes 5. Aloe aristata (lace aloe, now Aristaloe aristata) A compact stemless rosette 6–8 inches across, densely covered with soft white tubercles and finished with a fine thread-like bristle at each leaf tip — the "aristate" feature that names it. Forms tight clumps. Among the most cold-tolerant aloes, surviving brief frost. Frequently confused with haworthias, but the tubular orange flowers give it away. 6. Aloe brevifolia (short-leaf aloe, crocodile aloe) Chunky triangular blue-green leaves only 2–3 inches long, packed into a tight 4–6 inch rosette with soft pale teeth. Blushes a striking pink-bronze under bright light and mild stress, which is exactly why growers love it. Clumps into dense mats. Excellent in shallow bowls and rock gardens. 7. Aloe humilis (spider aloe, hedgehog aloe) A 4–6 inch rosette of narrow upward-curving blue-grey leaves covered in soft white bumps and bristles, giving a fuzzy silhouette. Offsets freely into colonies. Coral-orange flowers appear on stalks far taller than the plant itself. 8. Aloe 'Christmas Carol' A hybrid grown purely for color: deep green leaves with raised red-pink bumps running in rows down the center and vivid red marginal teeth, intensifying to near-crimson in strong light. Stays under 8 inches. One of the most decorative small aloes available. 9. Aloe 'Pink Blush' Narrow upright leaves striped and mottled in cream and pink over green, forming an 8–10 inch rosette. Color deepens with bright light and cool nights. Slow growing and worth the wait. 10. Aloe descoingsii The smallest aloe in cultivation — a mature rosette is barely 2 inches across. Tiny triangular white-spotted leaves with soft teeth. Native to Madagascar and endangered in the wild. A collector's plant for shallow pots and terrariums; see our terrarium guide for setup ideas. Architectural and Collector Aloes 11. Aloe polyphylla (spiral aloe) The most photographed aloe in the world. Grey-green leaves arranged in a perfect five-row Fibonacci spiral, forming a flat rosette up to two feet across. Native to the high Lesotho mountains, so unlike most aloes it wants cool temperatures, sharp drainage, and more moisture than a desert succulent. Notoriously difficult and never produces offsets, which is why it stays expensive. See our rare plants collection. 12. Aloe plicatilis (fan aloe, now Kumara plicatilis) Instantly recognizable: strap-shaped grey-green leaves with no teeth at all, arranged in flat opposing fans on the ends of thick woody branches. Grows into a small tree 6–8 feet tall. Looks more like a sculpture than a succulent. 13. Aloe striata (coral aloe) Broad flat blue-grey leaves with faint pale longitudinal stripes and, unusually, completely smooth pinkish-coral leaf margins with no teeth. That toothless coral edge is the identification giveaway. Forms a 2-foot rosette and produces branched heads of coral-orange flowers. 14. Aloe marlothii (mountain aloe) A massive single-stemmed tree aloe to 10 feet or more, with broad grey-green leaves densely covered in spines on both surfaces. Flowers held nearly horizontally in wide branched racemes — a distinctive silhouette in South African landscapes. 15. Aloe dichotoma (quiver tree, now Aldoendron dichotomum) The iconic Namib desert tree aloe, reaching 20 feet with a thick tapering trunk and repeatedly forking branches ending in small rosettes. Extremely slow. A prized container specimen for collectors in very dry, hot climates. Spotted and Striped Aloes 16. Aloe variegata (tiger aloe, partridge breast aloe, now Gonialoe variegata) Triangular dark green leaves in three tight ranks, boldly banded with irregular white blotches and edged in fine white teeth. Only 6–10 inches tall. The three-ranked leaf arrangement and crisp white margins make it unmistakable. 17. Aloe zebrina Slender green leaves crossed by clean transverse white bands — more regularly striped than the blotchy Aloe maculata. Reddens noticeably in drought and full sun. Forms clumps 12–18 inches across. 18. Aloe juvenna (tiger tooth aloe) Grows as a stacked, offsetting stem of short triangular leaves in tight spirals, white-spotted with pronounced soft pale teeth. Sprawls into trailing colonies over a pot edge, reaching about 12 inches. Often mislabeled Aloe squarrosa. 19. Aloe rauhii 'Snowflake' A 4-inch Madagascan miniature so heavily covered in white speckling that the leaves read as pale grey-white with green showing through. Compact, slow, and a favorite in dish arrangements. 20. Aloe nobilis (gold-tooth aloe) Bright green triangular leaves with conspicuous golden-yellow marginal teeth, forming 8-inch rosettes that flush orange-red in strong sun. Offsets rapidly into wide colonies. Tough, fast, and one of the easiest aloes for beginners. Quick Comparison Chart Species Mature size Leaf markings Teeth Habit Aloe vera 1–2 ft Plain grey-green, faint spots when young Soft, pale Clumping rosette Aloe maculata 1–1.5 ft Elongated white blotches in bands Dark reddish-brown Aggressive clumper Aloe arborescens 6–10 ft Plain blue-green, recurved Pale, prominent Branching shrub Aloe ferox 6–10 ft Plain blue-green, surface spines Reddish-brown, hard Single trunk Aloe aristata 6–8 in White tubercles, bristle tips Soft, white Tight clump Aloe brevifolia 4–6 in Plain blue-green, pink blush Soft, pale Mat-forming Aloe polyphylla 2 ft wide Plain grey-green Soft Single spiral rosette Aloe striata 2 ft Faint pale stripes None — smooth coral edge Single rosette Aloe variegata 6–10 in Bold white bands, 3 ranks Fine, white Slow clumper Aloe juvenna 12 in White spots, stacked leaves Soft, pale, prominent Trailing colony Aloe nobilis 8 in Bright green, red blush Golden-yellow Fast clumper Aloe descoingsii 2 in White spots Soft Tiny clump Caring for Any Aloe: The Universal Rules The good news about a genus this large is that care barely changes between species. Nearly every aloe wants the same five things. Requirement What aloes want Light Bright light, including several hours of direct sun. Most aloes stretch and pale without it. Water Soak thoroughly, then let the soil dry completely. Every 2–3 weeks indoors; monthly or less in winter. Soil Gritty cactus or succulent mix — at least a third perlite, pumice, or coarse sand. Pot Shallow and wide with drainage holes. Terracotta is ideal because it dries fast. Temperature 60–80°F. Most species are damaged below 40°F; A. aristata and A. polyphylla take more cold. Fertilizer Optional. Half-strength succulent feed twice in spring and summer is plenty. The single most common mistake is overwatering. Aloe leaves are water tanks; the plant expects drought. Mushy translucent leaves, a soft collapsing base, and blackening at soil level all mean too much water. Our root rot treatment guide covers rescue, and how often to water succulents gives you a seasonal rhythm. Signs of too little light: leaves stretching upward and flattening outward, losing their compact shape and any red or pink coloring. Move to a south or west window. Aloes sunburn if moved abruptly into intense sun, so increase exposure over two weeks. Propagation is effortless for clumping species: wait until an offset is a third the size of the parent, separate it with a clean knife keeping some roots attached, let the cut callus for a day, then pot in dry succulent mix and wait a week before watering. Leaf cuttings do not work for aloes, unlike many other succulents — see our succulent propagation guide for which methods suit which plants. Which Aloe Should You Choose? If you want… Choose Gel for burns and skin Aloe vera A first succulent that is hard to kill Aloe nobilis, Aloe brevifolia, Aloe juvenna Bold markings on a windowsill Aloe variegata, Aloe zebrina, 'Christmas Carol' Something tiny for a dish or terrarium Aloe descoingsii, Aloe rauhii 'Snowflake' An architectural statement Aloe plicatilis, Aloe striata, Aloe ferox Winter flowers for hummingbirds Aloe arborescens, Aloe maculata A genuine collector's challenge Aloe polyphylla, Aloe dichotoma Cold tolerance Aloe aristata, Aloe brevifolia Frequently Asked Questions How many types of aloe are there? Over 600 accepted species, plus hundreds of hybrids and cultivars. Recent botanical work has split several familiar plants into new genera — Aloe aristata is now Aristaloe, Aloe variegata is now Gonialoe, Aloe plicatilis is now Kumara — but they are still sold and grown as aloes. Are all aloes medicinal? No. Aloe vera is the species used for skin gel. Others, including Aloe ferox, contain bitter compounds used differently, and many species are not safe to ingest at all. Do not eat an unidentified aloe. Is my spotted aloe an Aloe vera? Probably not. Mature Aloe vera is essentially plain grey-green; heavy persistent white blotches usually mean Aloe maculata, Aloe zebrina, or Aloe variegata. Check the teeth: dark reddish-brown teeth point to maculata. Are aloes safe for pets? No — aloes are toxic to cats and dogs if chewed. See our pet-safe houseplants guide and non-toxic plants for cats for alternatives, or shop the pet-friendly collection. Why is my aloe turning red or brown? Usually sun stress, which is cosmetic and often attractive. Combined with shriveled leaves it means drought; combined with mushiness it means rot. Do aloes flower indoors? Rarely. They need years of maturity, strong light, and a cool dry winter rest to trigger blooming. Start Your Aloe Collection Aloes are the ideal collector's plant: they ask almost nothing, they multiply themselves into free plants, and the variety within one genus is astonishing. Start with two or three easy clumpers, give them the sunniest windowsill you have, and water them half as often as you think you should. Browse our succulents collection and small indoor plants, or read types of succulents and our succulent care guide to round out your knowledge. New to houseplants generally? Start with the best indoor plants for beginners.